Heat pumps allow
homeowners to heat their homes
via utilizing the unlimited heat
stored in the ground and/or air.
Underfloor supplies a pleasant
comfortable heat that is distributed
evenly around the room...
Solar panels capitalise
on available solar radiation
to meet your heat requirements...
Our systems are maintenance free,
however we would recommend a check
every 5 years. We are happy to service
systems not installed by ourselves.
Alternative Heating & Cooling Ltd was founded by Mike Cotter and Brendan Harte in 2001. Since then the team has grown in numbers, our qualifications include:
The heat pump works on the same characteristics as a standard domestic fridge but in reverse, instead of cooling, it heats. Heating and cooling are achieved by moving a refrigerant through various indoor and outdoor coils and components. A compressor, condenser, expansion valve and evaporator are used to change the state of refrigerant from a liquid to hot gas and from a gas to cold liquid.
Heat pump efficiency (COP) is obtained by comparing how much energy it consumes in order to complete the heating and cooling cycle. Coefficient of performance (COP) defined as: “The ratio of heat delivered by the heat pump and the electricity supplied to the compressor”
(COP = Kilowatts Delivered) eg. 7.5kw (Output) ÷ 1.5kw (Electrical Input) = 5 COP
Electricity is needed to drive the heat pump, but for every unit of electricity used, it will generate 3 to 5 units of useful heat. The efficiency of a heat pump will depend mainly on the temperature of its energy source and the temperature at which the heat generated is needed. Basically, the higher the temperature of the heat source is and the lower the temperature of the useful heat is, the more efficient the heat pump will be. A Ground Source heat pump using the soil as a heat source (constant temp of 8°C to 12°C) and floor or wall heating (water temp of 35°C to 55°C) is one of the best combinations, with an efficiency in excess of 450%, compared to an oil or gas boiler with an efficiency of 70 – 85%.